JPH0759141B2 - Wire drive - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a power source for a vehicle that requires opening and closing of windows, doors, etc. of various parts of a vehicle including a skylight, which is commonly called a sunroof, and other driving. The present invention also relates to a wire drive device that can be used as a power source that can be applied to houses and other structures, and mechanical equipment in general.

[Conventional technology]

2. Description of the Related Art There is conventionally known a wire drive device in which the rotation of a forward / reverse rotatable drive motor is directly converted into a reciprocating motion of a wire, and the wire is directly pushed and pulled to open and close the window glass.

In this drive device, a screw type flexible wire is passed through a hollow rotor shaft provided in a drive motor capable of rotating in the forward and reverse directions, and the wire is attached to an internal thread portion provided on the inner peripheral surface of the rotor shaft. It is constructed by screwing and guiding the wire to the window side by a wire guide outside the drive motor, and connecting the tip of the wire to the window glass. And the fifth
As shown in the figure, the lower end of the wire guide a was supported by the motor frame c of the drive motor b, and was close to the upper end of the rotor shaft d with a gap g. In addition,
In FIG. 5, e is a female screw portion, f is a screw type wire, h
Indicates a bearing.

In such a wire drive device, when the drive motor b is operated to rotate the rotor shaft d, the wire f can be moved in the axial direction by the engagement between the female screw portion e and the screw type wire f. Therefore, by rotating the drive motor b forward, the wire pushes up the window glass,
By rotating the drive motor b in the reverse direction, the window glass can be pulled down to automatically open and close the window.

[Problems to be Solved by the Invention]

By the way, the drive motor b may be arranged with its axis line vertically or obliquely, and in this case, water is used to travel down the wire guide a and the wire f as the window is opened and closed.

In such a case, not all the water that flows down the wire guide a and the wire f passes through the hollow portion of the rotor shaft d, and a part of the water does not pass between the lower end of the wire guide a and the upper end of the rotor shaft d. A gap g (this gap g is indispensable for preventing the rotation of the rotor shaft d from being transmitted to the wire guide a) is passed through the space g indicated by reference numeral i in FIG. Leak to. Therefore, in the above-described conventional configuration, water leaking into the space i may pass through the bearing h and enter the current-carrying portion in the motor frame c.

It is an object of the present invention to obtain a wire drive device that can prevent water from entering the energization part in the drive motor.

[Means for Solving the Problems]

In order to achieve the above object, in the wire drive device of the present invention, a recess opening in the upper end surface of the rotor shaft of the drive motor arranged with the axis vertical or oblique is provided in the upper end portion of the rotor shaft. The hollow portion upper end of the rotor shaft is opened on the bottom surface of the concave portion to communicate the concave portion with the hollow portion, and the lower end portion of the wire guide arranged on the upper side of the drive motor is provided with It is inserted in the recess with a gap provided between the recess and its inner surface.

[Action]

According to the wire driving device configured as described above, the inner surface of the recess formed in the upper end of the rotor shaft and the lower end of the wire guide are not in contact with each other by providing a gap therebetween. In addition to enabling smooth rotation of the rotor shaft, the rotation is not transmitted to the wire guide. Since the recess provided in the rotor shaft surrounds the lower end of the wire guide, it prevents water running down the wire from leaking out of the rotor shaft.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, reference numeral 1 is a drive motor composed of a commutator motor capable of forward rotation and reverse rotation by switching the current direction. As shown in FIG. 4, the drive motor 1 has bearings 3 mounted inside bearing brackets 2a and 2b formed at both ends of the motor frame 2, and a stator 4 made of a permanent magnet between the bearings 3. Mounted on the inner surface of the motor frame 2,
In addition, the rotor 5 penetrating the inside of the stator 4 is housed in the motor frame 2, and the commutator 6 attached to the rotor 5 is installed.
Is formed by pressing a pair of brush devices 7. The brush device 7 is attached to the inner surface of one end of the motor frame 2 via an insulating member 8. The drive motor 1 is arranged with its axis being vertical or oblique.

The rotor 5 has a commutator 6 mounted on the outer surface of a rotor shaft 9 whose both ends are rotatably supported by a bearing 3, respectively.
Attach the rotor core 10 so as to face the stator 4, and
A rotor coil 11 is wound around this core 10.

The rotor shaft 9 has a hollow structure, and a female screw portion 12 is formed on a small diameter portion provided on the upper inner peripheral surface of the rotor shaft 9. A recess 13 is formed at the upper end of the rotor shaft 9. Recess 13
Is provided so as to be opened on the upper end surface of the rotor shaft 9 as shown in FIG. 1, and the upper end of the hollow portion 9a of the rotor shaft 9 is opened at the center of the bottom surface of the rotor shaft 9. 13 is communicated with the hollow portion 9a.

A screw-type flexible wire 14 is screwed into the female screw portion 12 and penetrates the hollow portion 9a of the rotor shaft 9. Wire 14
Has a spiral on its outer circumference, and is formed, for example, by spirally winding the wire core material of a steel wire around the outer circumference at a constant pitch.

A wire guide 15 is arranged above the drive motor 1, and the guide 15 guides the wire 14 upward. The upper end of the wire 14 guided to the wire guide 15 is
As shown in the figure, the load is connected to, for example, a window glass 16 of an automobile through a connector 17. The wire guide 15
A groove 15a is provided along the axial direction of the connector as shown in FIG. 3, and a part of the connector 17 is vertically movably passed through the groove 15a. In addition, 18 to 20 in FIG. 2 are window glasses while restricting their positions in the front-rear direction and the left-right direction in FIG.
A guide member for guiding the vertical movement of 16 and a window opening 21.

Then, as shown in FIGS. 1 and 4, the wire guide
The lower end of 15 is inserted into the upper bearing bracket 2a of the motor frame 2, is supported by this bracket 2a, and is inserted into the recess 13 of the rotor shaft 9. A gap G is formed between the lower end of the wire guide 15 and the inner surface of the recess 13 as shown in FIG.

In the wire drive device having the above configuration, the drive motor 1 is operated to rotate the rotor shaft 9 in the forward direction, whereby the wire 14 is moved upward through the meshing between the female screw portion 12 of the rotor shaft 9 and the screw type wire 14. Sent axially towards.
Therefore, the wire 14 pushes up the window glass 16 to close the window. Further, by rotating the rotor 5 in the reverse direction, the wire 14 is fed downward in the axial direction due to the meshing of the female screw portion 12 of the rotor shaft 9 and the screw type wire 14, so that the wire 14 moves the window glass 16 Pull it down and open the window.

In such an operation, since the upper end of the rotating rotor shaft 9 and the lower end of the fixed wire guide 15 are close to each other with a gap G formed therebetween, the rotation of the rotor shaft 9 is prevented. The rotor shaft 9 can be smoothly rotated without being transmitted to the wire guide 15.

And, although the gap G as described above is provided between the upper end of the rotor shaft 9 and the lower end of the wire guide 15, the recess 13 is provided in the upper end of the rotor shaft 9. Since the lower end of the wire guide 15 is inserted therein and a gap G is formed between them, this gap G is provided within the length range of the rotor shaft 9.

Therefore, when water flows down the wires 14 and the wire guides 15 and enters the drive motor 1, the recess 13 surrounding the lower end of the wire guides 15 causes the rotor shaft 9 to move.
It is possible to prevent water from leaking to the outside, and all the invaded water can be discharged from the lower end to the outside of the drive motor 1 through the hollow portion 9a of the rotor shaft 9.

Therefore, the water that has entered the drive motor 1 is prevented from passing through the gap G and reaching the space 2c (see FIGS. 1 and 4) inside the bearing bracket 2a of the drive motor 1, and eventually, the space 2c. There is no risk that water will infiltrate into the energized parts (the rotor coil 11, the commutator 6, the brass device 7) in the drive motor 1 from the bearing 3 through the bearing 3.

〔The invention's effect〕

According to the present invention configured as described above, a recess is provided at the upper end of the hollow rotor shaft that is arranged with the axis vertically or obliquely and that is provided in the drive motor that drives the screw-type wire. With the structure in which the lower end of the wire guide is inserted with a gap provided between the inner surface and the inner surface of the rotor, it is possible to prevent water that penetrates through the wire or the like from leaking to the outside of the hollow portion of the rotor shaft. Water can be prevented from entering the energized parts.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a vertical cross-sectional view of a main part, FIG. 2 is a view schematically showing a partial cross-section of the entire apparatus, and FIG. The drawing is a sectional view taken along the line III-III in FIG. 2, and FIG. 4 is a longitudinal sectional view of the drive motor. FIG. 5 is a vertical sectional view of an upper portion of a drive motor in a conventional wire drive device. 1 ... Drive motor, 9 ... Rotor shaft, 9a ... Hollow part, 12
...... Female thread part, 13 ...... concave part, 14 ...... wire, 15 ...... wire guide, G ...... gap.

Claims (1)

[Claims] 1. A forward-reverse rotation drive motor is arranged with its axis being vertical or oblique, and a screw type wire is passed through a hollow rotor shaft provided in the drive motor, and the wire is used as the rotor. In a wire drive device that is screwed into an internal thread portion provided on the inner peripheral surface of a shaft to move the wire in the axial direction by the rotation of the rotor shaft, a recess opening at the upper end surface of the rotor shaft is rotated. A wire guide that is provided on the upper end of the child shaft, opens the upper end of the hollow portion of the rotor shaft in the bottom surface of the recess to communicate the recess and the hollow portion, and is arranged on the upper side of the drive motor. The wire driving device is characterized in that the lower end of the wire is inserted into the recess with a gap between the lower surface and the inner surface.